California law requires hospitals, physicians and certain other health-care providers to report data aboutcancer patients for epidemiological research. Physicians who diagnose or provide treatment for cancermust report each cancer case to the California Department of Public Health (CDPH) or to a RegionalRegistry. Physicians must report data about only cancer patients diagnosed and treated solely in theoffice setting, that is, patients who do not enter a hospital or treatment facility. (Health & Safety Code§103885, 17 C.C.R. §2593.) A list of the regional registries can be found at the California Departmentof Public Health, California Cancer Registry’s website, www.ccrcal.org/.